Valve.



No. 831,742. PATENTED SEPT. 25, 1906. H. D. POWNALL.

VALVE.

APPLICATION FILED JUNE 19,1905.

f luventoz 33 i hwooeo IIITE STATES PATENT OFFICE.

HENRY D. POWNALL, OF CINCINNATI, OHIO.

VALVE.

To all whom it may concern:

Be it known that I, HENRY D. PQWNALL, a citizen of the United States, residing at Oincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Valves, of which the following is a specification.

My invention relates to improvements in valves. I

One of its objects is to provide an improved valve with removable seat. v

vAnother object is to provide improved mechanism for locking the seat in place and detaching the same when required.

Another object is to provlde an improved valve and seat whereby wear and injury to the seat is prevented.

It further consists in certain details of form, combination, and arrangement, all of which will be more fully set forth in the description of the accompanying drawings, in which Figure l is a central vertical section through one form of my improved valve. Fig. 2 is a bottom plan view of the valve. Fig. 3 is a side elevationof the cage which serves to lock the seat in place. Fig. 4 is a bottom plan view of the bonnet. Fig. 5 is a central vertical section through the cage, showing a modification thereof. Fig. 6 is a bottom plan view of a modified bonnet to be used with the cage, Fig. 5. Fig. 7 is a view, similar to Fig. 1, showing a reversible valveseat and modified forms of the cage and bonnet.

My improved valve may be manufactured in various formssuch as angle, straightglobe, cross-valves, check and regulator valves-depending upon the service for which it is required.

As shown in Figs. 1 to 4, A represents the casing, frame, or shell. B represents the detachable seat; O, the valve-disk, having a pivotal connection with the valve-stem-D. E represents a cage which serves to lock the seat in place; F, the bonnet, through which the valve-stem projects, and G a threaded nut which clamps the bonnet in place. has threaded engagement with the interior of the shell, so as to be screwed down to clamp the detachable seat in place and is also rovided with recesses e, which are engage by projections f of the bonnet. The bonnet has a polygonal wrench-seat at f, by which it may be turned by an ordinary wrench to screw the cage into engagement with the valve-seat. When the cage is screwed into Specificationof Letters Patent.

Application filed June 19, 1905. Serial No 265,910.

The cage Patented Sept. 25, 1906.

7 position, itsupper edge is below the upper edge of the shell, so that the flange 2 of the bonnet makes a tight joint with the shell and is locked in this position by the nut G. Thus the cage may be screwed into or out of the shell at any time without requiring the use of special tools. The seating face a of the valve-disk is adapted to engage and form a tight joint with the seating-face b of the seat B to close the valve. The valve-seat also has a cylindrical portion or face 3, which snugly fits the exterior of the cylindrical portion 4 of the valve-disk. 5 represents grooves in the end of the projection 4, preferablyof V shape. An annular recess 6 is also preferably provided between the faces b 3' of the valve-seat. Thus when the valve commences to open the cylindrical portion of the valve prevents the escape of fluid across or between the slightl separated faces I) c, and the resulting tendency to wiredraw or cut grooves in said faces. The escape through the valve is thus practically cut off until the apex of the grooves 5 pass the cylindrical face 3, which does not occur until the faces I). 0 have been separated a suflicient distance to prevent injury thereto. (See position Fig. 7.) The cage also serves as a guide for the valve-disk, causing it to always seat properly on the valve-seat. Thus arranged, t 1e cage and valve-seat are not liable to become loose after being once adjusted, since the clamping of the bonnet locks the cage in place. Also no gasket-joints are requlred. The intercngaging parts of .the bonnet and ca e may be variously modified. Thus in t 1e modification Figs. 5 and 6 the cage E has a polygonal seat 7, into which extends the polygonal projection 8 of the bonnet, by means of which the cage may be rotated.

In Fig. 7 I have shown segmental threads or short spiral ribs 9 on the cage enga ing corresponding ribs 10 on the interior of t 1e shell, the shell also having vertical ribs 11 to engage vertical ribs 12 on the bonnet, by means of which the ca e may be rotated to lock the seat in place. T 1e seat B (shown in Fig. 7) has separate seating-faces 14 15 on opposlte sides and may be reversed when desired. The seat and cage may, if desired, be madein onepiece.

The valve herein described is simple in vform, can be readily adapted to the different styles required, does not require extra work or to be chucked more than once in construction, since all the work is done from one side.

The valve herein shown and described is I capable of considerable modification Without departing from the principle 05 my invention.

Having claim is v 1. in a valve, a shell, a detached seat, a. valve-disk to close the opening in said seat, a cage having threaded engagement with the shell to lock the seat in place, a bonnet seat ing upon a face on the shell, a nut to clamp the bonnet in place and interengaging members on the cage and bonnet to rotate the cage when the bonnet is rotated.

2; In a valve, a shell, a detachable seat, a valve-disk to close the opening in said seat, a

described my invention, What I shell; to loc cage havin interengaging contact with the x 5 the cage and seat in place, a bonnet having an annular seat upon the shell, means for clamping the bonnet upon the shell, and interengaging members on the cagexand bonnet to adjust the cageby the ro-= tation of the bonnet.

In testimony whereof i have affixed my signature in presence of two Witnessesl.

HENRY POWNALL.

Witnesses: 1

S. Mans;

M. Gear-men. 

